Home / 2,989.40-4,124.88-1,663.07

Finding the Fourth Proportional to 2,989.40, 4,124.88 and 1,663.07

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Solution

The fourth proportional to 2,989.40, 4,124.88 and 1,663.07 is: 2,294.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.40 : 4,124.88 = 1,663.07 : x
  2. Step 2: Convert to fraction form
    2,989.40/4,124.88 = 1,663.07/x
  3. Step 3: Cross multiply
    2,989.40x = 4,124.88 × 1,663.07
  4. Step 4: Simplify right side
    2,989.40x = 6,859,943.56
  5. Step 5: Solve for x
    x = 6,859,943.56/2,989.40
  6. Step 6: Final answer
    x = 2,294.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.